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Chapter 6

DIAGNOSTIC TESTS

There might be times when the modem does not seem to cooperate no
matter what you do. Because your communications system is made up
of many links, the source of the problem might be the modem, your
computer, the telephone circuit, the remote modem, the modem cable,
or the remote computer. However, diagnostic tests can isolate system
problems and eliminate time consuming guess work when
communication failure or high error rates occur.

6.1 Diagnostic Test Functions

The following are the diagnostic tests your modem performs. Note that
&T6, &T7, and &T3 are not applicable in Bell 103, CCITT V.21, or
V.23.

Local Analog Loopback Test (LAL)

&T1

Tests the communications path between the local modem and the
local computer.

Local Digital Loopback Test (LDL)

&T3

Tests the communications path between the modem, remote
modem, remote computer, and telephone circuit.

Remote Digital Loopback Test (RDL)

&T6

Tests the communications path between the modem, local

computer, remote modem, and telephone circuit.

Remote Digital Loopback With Self Test (RDLST)

&T7

Tests the communications path between the modem, remote
modem, and telephone circuit.

Local Analog Loopback With Self Test (LALST)

&T8

Tests the modem.

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Содержание 3314LC

Страница 1: ... contents of the package for shipping damage If there is damage immediately repack the modem in the original packing material and contact your dealer 1 2 Modem Front Panel and LED Indicators Located on the modem front panel are the LCD LCD configuration buttons LCD Panel Lock switch the Voice Data switch and the LED indicators The modem LCD LCD configuration buttons Panel Lock switch and Voice Dat...

Страница 2: ... from the local computer CD Carrier Detected Lit when a remote modem carrier is detected OH Off Hook Lit when the modem is using the telephone line off hook Off when the modem is not using the line on hook 1 3 Modem Rear Panel Located on the modem rear panel are the power switch power socket volume control RS 232 connector and two modular jacks as shown in the schematic The power socket is labelle...

Страница 3: ...ephone set or an incoming leased line RJ 45 If you do not wish to use a telephone set with your modem leave the PHONE jack unconnected 1 4 Serial Port and RS 232 Cable Fig 1 1 Modem Rear Panel RJ11 RJ11 Cable To OTE Computer Power Adaptor Dialup Line ON VOL 9V AC RS 232 PHONE LEASE LINE Your computer requires an industry standard RS 232 serial port in order to use this modem or any other external ...

Страница 4: ...ns Make sure that both the telephone system and telephone line are in good order before the modem is connected First test the line condition by lifting the telephone handset listening for a clear dial tone and then placing a few calls If the calls do not go through well or are not loud and clear you may have a poor quality telephone line If this is the case find a better quality line for your mode...

Страница 5: ...ble into the modem and plugging the other end of the cable into your computer s serial port Secure all the connector screws NOTE Verify and write down which serial port COM1 to COM4 connects your modem to the computer as the port number is required during communications software installation Refer to the manual for your serial interface card or your terminal to find out how the port is set or conf...

Страница 6: ...tions protocol is either ITU T or Bell 3 The data is formatted correctly including data bit parity and stop bit 8N1 or another valid format A serial port can accept only one peripheral device and vice versa The serial port number specified in the communications software must be consistent with the computer s serial port to which the modem is actually connected The selection of a serial port is don...

Страница 7: ... selects the X4 response set ATS6 10DP Instructs the modem to wait for 10 seconds and then use pulse dial the call ATM2L3DT The modem monitoring speaker is always on with high volume and tone dials the call ATB0DT Instructs the modem to use ITU T protocol to establish a connection with the remote modem and tone dial the call AT P1DP Pulse dials with a make break ratio of 33 67 for most European co...

Страница 8: ...3 Q3 V4 A13 To set the modem to operate in MNP reliable mode and hang up when a MNP reliable link cannot be established the Dialing Prefixes are AT J0 N2 Q3 V0 C1 Data compression enabled AT J0 N2 Q3 V0 C0 Data compression disabled 1 9 Getting Started Now you are ready to dial a bulletin board data base or remote computer and your modem will automatically establish a connection As soon as a connec...

Страница 9: ...em main menu directories subdirectories and their contents The modem LCD main menu is divided into four areas STATUS SETUP PROFILE and EXECUTE Moreover the four main menu areas contain directories and some contain subdirectories as well Follow the directions below to enter the LCD main menu directories subdirectories and their contents 1 Using the power switch located on the modem rear panel turn ...

Страница 10: ...or subdirectory and viewing its contents pressing the ENTER button will assign configurations to the modem for operation At this point users should be able to hear a beep from the modem and see an asterisk next to the configuration representing that the configuration is now enabled 5 Once you enter any particular directory subdirectory or the contents of either use the left and right arrow buttons...

Страница 11: ...nel Lock Switch The Panel Lock switch located on the modem control panel secures the LCD panel buttons from unauthorized use and protects your communications and configurations from interruption due to accidental panel button operation To use the Panel Lock switch press and hold the Panel Lock switch and the LCD will display PANEL LOCKING with a cursor crossing the LCD below the message until the ...

Страница 12: ...ick up their telephone handset connected to their modem As soon as the link is switched to talk link your modem will issue a NO CARRIER message on the screen and the connection is bypassed to the telephone handset connected to your modem If the handset is not picked up before flipping the switch to VOICE the call is disconnected When the conversation ends follow the procedures below to resume data...

Страница 13: ...ollowing descriptions of the directories and their contents for moden status functions and control All modem commands and modem registers for any particular setting are indicated by bold type 2 5 STATUS Main Menu STATUS in the Main Menu is set up to provide a quick reference for the operation status of the modem QUALITY line quality GOOD MEDIUM BAD S N RATIO xx dB RX LEVEL xx dBm TX LEVEL xx dBm R...

Страница 14: ... The DTE directory contains the following settings DTE SPEED AUTO 110 300 600 1200 2400 4800 7200 9600 14400 19200 28800 38400 57600 115200 DATA BITS 7 8 PARITY NONE SPACE EVEN ODD STOP BIT 1 2 FLOW CONTROL Q NONE XON XOFF CTS ONLY RTS CTS DTR CONTROL D IGNORE DTR COMMAND STATE DISCONNECT RESET DTR DROP TIME S25 xx 10ms DTR RISE TIME xx 10ms RTS CONTROL R CTS TRACK RTS IGNORE RTS RTS CTS DELAY S26...

Страница 15: ...IS ONLY SYN MODE M ASYN SYN1 SYN2 SYN3 CNG TONE DISABLE ENABLE TX CLOCK X INTERNAL FROM DTE FROM REMOTE DCD ON TIME S9 xxx 100ms DCD OFF TIME S10 xxx 100ms GUARD TONE G DISABLE 550Hz 1800Hz RLSD LEVEL 43 48dBm 33 38dBm 26 31dBm 16 21dBm AUTO RETRAIN E DISABLE ENABLE WITH SPEED DISCONNECT Y NORMAL LONG SPACE CLEAR DOWN 2 9 SETUP Main Menu COMMAND Directory The COMMAND directory contains the followi...

Страница 16: ...xx 20ms CR CHAR S3 xxx LF CHAR S4 xxx BS CHAR S5 xxx 2 10 SETUP Main Menu LINE Directory The LINE directory contains the following settings TYPE SELECT L DIAL LINE 2W LEASED 4W LEASED DIAL METHOD Y NORMAL DIAL DL SIMU LL LL BACKUP DL BACKUP TIMER S15 xxx min 1 255 BACKUP TIMES S13 xxx 0 225 BACKUP RETRY B xx 0 15 RI OFF TIME xx sec 0 15 PULSE M B P US UK Page 16 ...

Страница 17: ...ECT CODE V DCE SPEED DTE EC DCE EC DTE EC COMP DCE EC COMP QUICK RESET NORMAL ATZ AT F QUICK ATZ QUICK AT F QUICK ATZ AT F 2 12 SETUP Main Menu CALL BACK Directory The CALL BACK directory contains the following settings CB ACTIVE A ENABLE DISABLE CB TIME D xxx sec SET CLOSE MSG G xx characters SET OPEN MSG O xx characters SET PASSWORD Wn 0 9 xx characters or letters SET PHONE NO Zn 0 9 xx characte...

Страница 18: ...ettings FB THRESHOLD 26400 24000 21600 19200 16800 14400 12000 9600 7200 4800 2400 not available yet SECURITY DTMF CONNECT E ENABLE DISABLE SET DTMF P xxxxxxx WAIT DTMF S48 x sec SET VAR A S0 xxxxxxxxxxxxxxx CHECK VAR A C0 xxxxxxxxxxxxxxxxx SPK CONTROL M DISABLE OFF UNTIL CD ON ALWAYS ON OFF WHEN DIAL SPK VOLUME L OFF LOW MEDIUM HIGH DL TX LEVEL K0 xx dBm LL TX LEVEL K0 xx dBm Page 18 ...

Страница 19: ...L 6 SYN D AT DIRECT 7 SYN A AT DIRECT 8 ASY V25BIS 9 SYN BSC V25BIS 10 SYN HDLC V25BIS 11 PWR 2W LEASED 12 PWR 4W LEASED SET S REG Sxx xxx LOAD PROFILE Z 1 2 3 4 SAVE PROFILE W 1 2 3 4 MAJOR DEFINE Y 1 2 3 4 2 16 EXECUTE Main Menu DIAL ANSWER TEST and HANG UP Directories 1 The DIAL directory contains the following settings DIAL A TEL D xxxxxxxxxxxxxxxx POWER ON DIAL An 0 1 2 3 4 5 6 7 8 9 Page 19 ...

Страница 20: ...TIME S8 xxx sec CALL TIME S7 xxx sec REDIAL DELAY N5 xxx 2sec REDIAL TIMES N xx DIAL TYPE TONE PULSE DTMF DURING S11 xxx ms 2 The ANSWER directory contains the following settings MANUAL ANSWER A ON OFF RING TIMES S0 xxx 3 The TEST directory contains the following settings CLEAR TEST T0 ON OFF LAL T1 ON OFF LDL T3 ON OFF RDL T6 ON OFF RDLST T7 ON OFF LALST T8 ON OFF GRANT RDL ON T4 OFF T5 PATTERN 5...

Страница 21: ...RDL BY 140 ON OFF AL BY 141 ON OFF TEST TIMER S18 xxx sec 4 The HANG UP directory contains the following settings HANG UP ON OFF Page 21 ...

Страница 22: ...n command state or data state The figure below shows the relationships between the two states and how to enter and abort from each In command state the modem interprets all characters it receives as Page 22 Power Up Off Line Command State Connecting On Line State ATZ DTR off to on M2 M3 ATD ATA Auto Answer Power Up On Line Command State Async mode only Connection Established Escape DTR Loss D1 Car...

Страница 23: ...state simply issue ATO The escape command in default is three consecutive characters In order for the modem to distinguish an escape command from data a certain duration of guard time should exist both prior to and after the three consecutive escape characters Therefore the escape sequence includes first a guard time second three consecutive escape characters and last of all a guard time The guard...

Страница 24: ...lows the modem to act as a dedicated auto answer modem or configures the modem for synchronous mode 2 or 3 operation Smart Dumb mode is configured through the LCD control panel in the SETUP Main Menu Command Directory under MODE SELECT or by issuing the proper I command To exit Dumb Mode and return to start mode by entering the SETUP Main Menu Command Directory under AT Enable AT you should hear a...

Страница 25: ...or PC users SCP3 is for Macintosh or terminal users for ECDC operation SCP4 is for Macintosh or terminal users for non ECDC operation The table below lists the SCPs and their corresponding profiles and operation modes Operation Mode F Command SCP1 ECDC C1 D2 SCP2 non ECDC C1 D2 SCP3 ECDC C0 D0 SCP4 non ECDC C0 D0 3 7 Major Stored Configuration Profile Major SCP The major SCP is loaded to ACA each ...

Страница 26: ...rther use issue command W followed by the SCP number Issuing command V0 will display the current major configuration profile the stored configuration profiles as well as the current speed data format parity and protocol 3 9 Stored Telephone Numbers STN STNs are the digits retained in the modem NVRAM to be used for dialing You may save frequently used telephone numbers passwords or credit card numb...

Страница 27: ...N2 AT DT S 2 Dials STN2 782 2456 AT DT 2 Dials STN2 782 2456 AT DT 886 2 2 Dials 886 2 STN2 782 2456 AT DT 886 2 S 2 Dials 886 2 STN2 782 2456 4 2 Swap Dialing Swap dialing automatically dials another telephone number when the first number is busy by specifying two numbers spaced by swap dialing command N When the modem goes to dial it dials the first number If the first specified number is busy t...

Страница 28: ...Operation In addition to dialup line operation the modem can be used on a leased line for dedicated communications between two destinations To set up a pair of modems for leased line communications follow the procedures below 1 Connect two modems on the 2 wire or 4 wire leased line and make sure the 2 wire or 4 wire leased line is connected to the modem phone jack Use the RJ 45 to Y connector cabl...

Страница 29: ...tinuously attempt to establish a leased line connection with a remote modem until successful For power on leased line operation 1 Set your modem for leased line operation as explained in the previous section 2 Issue AT F L1S0 1 I1 W to one modem setting it as the 2 wire leased line answering modem 3 Issue AT F L1S0 0 I1 W to the other modem setting it as the dialing modem Simply change L1 to L2 in...

Страница 30: ...blishing a connection through the dialup line and detects if a leased line connection can be established Functional only in dial mode ATS13 200 Limits the number of times the modem switches between the leased line and dial up line to 200 times ATN 3 When the dial up line is busy the redial times does not exceed 3 times AT B2 After the leased line is disconnected the number of retries does not exce...

Страница 31: ...ely dial the Nth telephone number set Note that telephone numbers must first be set up with command Zn before using this function AT A W When the power is turned on the modem dials the STN 0 telephone number set and saves it as the major profile AT A3 W When the power is turned on the modem dials the STN3 telephone number set and saves it as the major profile 4 9 Dialup Simulate Leased Line If the...

Страница 32: ...your connection password is 123 The modem waits 15 seconds for passwords and assigning a different value to register 48 changes the waiting period Note that the number of commas waiting period you type after the telephone number can not not exceed the S48 value P Sets the connection password up to 9 digits 0 9 and on a touch tone telephone keypad AT P 7452 Sets the local modem connection password ...

Страница 33: ...links but note that RA links are only possible if the RA SEC CHANNEL in the REMOTE ACCESS directory is activated in addition to command E1 P Set RA Password 4 12 VAR Password Protection With VAR Password Protection software developers Value Added Reseller VAR can implement check points so software executes pre designed subroutines or quits execution if incorrect VAR passwords are detected If passw...

Страница 34: ...delay time specified by command D If an incorrect password is received or if there is inactivity for more than ten seconds the modem hangs up AT A1 Enables call back security AT Z3 7820041 Sets the 3rd telephone number set as 782 0041 AT W3 MISC Sets the 3rd telephone number set password as MISC AT D10 Enables a 10 second delay between successful password entry and the matching dial back telephone...

Страница 35: ...V25bis HDLC Please note the following before setting you modem to the above mentioned modes 1 Remember to issue command W after the setting if you want to save it 2 Only in V 25bis Asynchronous Mode you can issue V 25bis commands hardware control In HDLC Mode and BSC Mode you need a synchronous card to issue V 25bis commands Command Instructions The following are V 25bis commands their definitions...

Страница 36: ...occurs while executing CRN commands the following responses will be issued CONDITION RESPONSE 1 DTR Off INV 2 Parameter Error INVPV 3 No Dial Tone CFIAB 4 No Carrier CFIRT 5 No Answer CFINT 6 Busy CFIET For example Command and Response Status Instruction 1 CRN2577125 DTR Off Dial INV DTR is off 2 CRN257AB25 Telephone number INVPV only 0 9 w P T and spaces 3 CRN2577125 Busy Dial CFIET Busy 3 CRS Ca...

Страница 37: ...age Successful response is VAL Failed response is INVCU Example 1 CNLX4B1 VAL 2 CNL T INVCU T is not the correct command 5 DIC Disregard Incoming Call Definition Limits S0 and S1 can not equal 0 Message Successful response is VAL Failed response is INV Example 1 INC S0 not equal to 0 S1 not equalto 0 DIC DTE command VAL 2 S0 0 DIC INV 3 S0 not equal to 0 S1 not equal to 0 DIC INV Page 37 ...

Страница 38: ...sts all LSN 0 LSN 1 318 LSN 9 7822456 VAL 2 RLN 1 Lists STN1 LSN 1 318 VAL 3 RLN 10 Lists STN0 INVPV Range 0 9 7 PRN Program Telephone Number Definition Stored telephone number to STNn Limits None Message Successful response is VAL Failed response is INVPS Example 1 PRN 2 433 Sets STN2 433 VAL RLN 2 List STN2 LSN 2 433 VAL 2 PRN 2 Clears STN2 VAL RLN 2 LSN 2 Page 38 ...

Страница 39: ...3 VAL Like AT command OK message 4 INVxx Like AT command error message 5 CFIxx Like AT command ATD s error message INVCE Command Unknown Unexpected Error INVMS Message Syntax Error INVPS Parameter Syntax Error INVPV Parameter Value Error CFUET Remote Busy CFINS Telephone Number not stored CFICB Local Busy CFIRT No Carrier CFIAB Abore Call No Dialtone CFINT No Answer CFIFC Forbidden Call Page 39 ...

Страница 40: ...xes receive voice messages and listen to the voice message or delete message at any time even from remote site The functions are better not only than answering machine but also telephone secretary system For more details please refer to the Data Fax Voice multi communication software user s manual The author of the software also release complete Voice Audio command appendix E as a reference for Vo...

Страница 41: ... Auto Answer An Range n 0 255 Unit Rings Command An instructs the modem to immediately answer incoming calls The number of rings by which the modem goes off hook to answer is determined by register S0 If a number follows command An the modem goes off hook to answer on the specified number of rings For example A3 Instructs the modem to auto answer on the third ring and then enter data state after a...

Страница 42: ...Back Channel B3 Selects ITU T V 23 Main Channel 5 6 Dial In Originate Mode D Command D instructs the modem to dial the number following it and enter data state after a connection is established The number following command D may include the digits 0 through 9 dial modifiers A B C D N P T R S S n W the symbols comma exclamation semicolon and n Swap Dialing N Inserting command N between two telephon...

Страница 43: ...example AT Z2 782 2456 Saves 782 2456 to STN2 AT DT S 2 or 2 Dials 782 2456 STN2 AT DT 886 2 S 2 or 2 Dials 886 2 782 2456 AT DT S 2 N 4 Dials STN2 if STN2 is busy STN4 is swap dialed When dial modifier S n is used the command buffer will count S n as three characters Also dial modifier S n must be preceded by dial command D DT or DP Pause Comma Command comma instructs the modem to wait for the ti...

Страница 44: ...mand State semicolon Ending a dial command line with command semicolon instructs the modem to enter command state after dialing rather than going on line and into data state Other commands may follow command in the same command line 5 7 Command Character Echo E Command E enables or disables the sending of command characters back to the computer It is only effective in command mode E0 Displays the ...

Страница 45: ...I1 Displays the checksum code of the modem s firmware ROM in ASCII digits followed by a carriage return and line feed I2 Executes the modem s checksum test and sends an OK or ERROR response code 5 10 TX Level K0 n Range n 0 15 default 10 Command K0 n determines the carrier level control n dbm TX level setting Leased line TX level 0 31dBm Dial line TX level 0 15dBm 5 11 Speaker Volume L Command L a...

Страница 46: ...r on until a carrier is detected but turns the speaker off when the modem is dialing 5 13 Redial Times N n Range n 0 15 Unit Times Default 0 Command N n determines how many times the modem redials a call if a busy signal is detected The default setting is N 0 so the modem will not redial Note that the redial function is cancelled if you abort dialing 5 14 Redial Interval N5 n Range n 0 255 Unit 2 ...

Страница 47: ...ine data state and initiates an equalizer retrain sequence at the same speed This is used when excessive bit error rates occur and a retrain might reduce the errors attributed to a loss of equalization Note that this command is effective only at 2400 bps or above 5 18 Pulse Dialing P Inserting command P before a telephone number instructs the modem to pulse dial the number You may insert command P...

Страница 48: ...lays the content of register r For example ATS7 Displays the value stored in register S7 ATS5 S7 Displays the values in both register S5 and S7 5 21 Set Register Sr n Command Sr n sets register r to value n For example ATS0 3 Sets register S0 to3 5 22 Touch Tone Dialing T Inserting command T before a telephone number instructs the modem to tone dial the number The tone dialing speed is determined ...

Страница 49: ...ECT This form is easier for users to read 5 24 Wait For Second Dial Tone W Inserting command W in a dial command line causes the modem to wait for a three second continuous dial tone before proceeding to dial the digits following it The modem will respond with NO DIAL TONE if it fails to detect the tone or with BUSY if the line is busy 5 25 Response Set Xn Range 0 4 Default 4 Command Xn determines...

Страница 50: ...D2 option is selected Y2 Enables clear down disconnect 5 27 Reset Zn Command Zn resets the modem a with factory default profile FDP and a stored configuration profile SCP Z0 Resets the modem with FDP and then with the major SCP if command Y is in effect Z1 Resets the modem with SCP1 Z2 Resets the modem with SCP2 Z3 Resets the modem with SCP3 Z4 Resets the modem with SCP4 5 28 Power On Auto Dial wi...

Страница 51: ...ins an active line connection D2 Instructs the modem to go on hook assume command state and disable auto answer upon detecting a DTR on to off transition The auto answer function can be re enabled by turning DTR on again D3 Instructs the modem to re initialize itself when it detects a DTR on to off transition The ACA is overwritten by the active SCP 5 31 Load Factory Default Profile F Commands F0 ...

Страница 52: ...power on 2 wire leased line F12 For power on 4 wire leased line 5 32 Guard Tone G Command G selects the guard tone in ITU T V 22 and V 22bis modes and is effective only in these modes G0 Disables guard tone G1 Selects 550 Hz guard tone G2 Selects 1800 Hz guard tone 5 33 Leased Line or Dialup Line L Command L is issued according to the type of telephone line used with the modem L0 Sets the modem fo...

Страница 53: ...to off transition starts handshaking directly 5 35 Pulse Dialing P Command P determines the pulse dialing method Note that command P is effective only when pulse dialing P0 Selects the make break ratio of 39 61 for modem use in U S A or Canada P1 Selects the make brake ratio of 33 67 for modem use in United Kingdom or Hong Kong 5 36 Asynchronous or Synchronous Mode Q Command Q has the same functio...

Страница 54: ... manual for further details 5 40 Read Configuration Profile V Command V displays the stored configuration profile SCP the stored telephone number STN and current modem operation states V0 Displays ACA SCP and current modem operational status V1 Displays STN 5 41 Write Configuration Profile W Command W writes the content in the active configuration area ACA to one of the stored configuration profil...

Страница 55: ...turned on Y1 Assigns SCP1 as the major SCP Y2 Assigns SCP2 as the major SCP Y3 Assigns SCP3 as the major SCP Y4 Assigns SCP4 as the major SCP 5 44 Stored Telephone Number Zn Range n 0 9 Command Zn x stores the telephone number following it as an STN to be used later by issuing dialing modifiers S n or n For example AT Z0 782 2456 Stores 782 2456 as STN0 AT Z9 02 782 0305 Stores 02 782 0305 as STN9...

Страница 56: ...Do not press the return key 3 Wait for another second of guard time without typing or transferring anything Upon recognition of the escape sequence the modem sends an OK response code and escapes to command state The default escape character is ASCII 43 and the default guard time is one second Both are changed by adjusting the values in registers S2 and S12 respectively 5 46 Call Back Security A C...

Страница 57: ... Call Back Security Time Delay Dn Range 1 255 Unit sec Default 30 Command Dn instructs the modem to wait for the specified delay time before proceeding to dial the caller s telephone number 5 50 Connection Password Security E Command E enables or disables connection password security If enabled callers must include the correct password in the dial command string If the password is correct a connec...

Страница 58: ...ult closing string is THANK YOU YOU WILL BE CALLED BACK 5 53 Smart Dumb Mode Command I instructs the modem to enter smart or dumb mode I0 Sets the modem to smart mode I1 Sets the modem to dumb mode and is disabled when the modem is turned off 5 54 Opening Message O String length up to 60 characters Command O sets an opening message Refer to the syntax below AT O enter Message enter message string ...

Страница 59: ...ned by S0 To write the password to the VAR buffer follow the syntax below Syntax AT S0 old password new password CR Response OK if old pattern VP0 then VP0 new password 5 58 View Call Back Settings Vn Command V allows you to view and check passwords messages and telephone numbers stored in the modem memory V0 View call back security password dictionary V1 View call back security telephone director...

Страница 60: ... 61 Set Call Back Telephone Number Zn n 0 9 String can contain up to 49 dial modifiers To set the call back telephone number issue command Zn dial modifier string 5 62 V25bis Operation Modes C Command C determines V25bis operation modes C0 Disables V25bis operation C1 Enables V25bis asynchronous operation C2 Enables V25bis bi synchronous operation C3 V25bis HDLC operation Page 60 ...

Страница 61: ...limited to 9 printable ASCII characters 3 The RA SEC CHANNEL in the LCD SETUP Main Menu Remote Access Directory must be ON before an RA connection is possible 5 65 Maximum MNP Block Size A Command A sets the maximum MNP block size for reliable links A0 Block size is 64 characters A1 Block size is 128 characters A2 Block size is 192 characters A3 Block size is 256 characters 5 66 Transmit Break Bn ...

Страница 62: ... be discarded C1 Instructs the modem to buffer the data it receives during the waiting period In reliable links the modem discards the data If the waiting period 4 seconds expires or 200 characters have been buffered the modem falls back to normal mode and passes the buffered data to the local computer C2 Instructs the modem not to buffer data and immediately switch to normal mode upon receiving t...

Страница 63: ...rns the modem s serial port baud rate adjustment capability on or off J0 Turns off serial port baud rate adjustment The serial port speed is fixed regardless of the on line speed This is used when the modem is in normal or reliable link J1 Turns on serial port baud rate adjustment The modem automatically adjusts its serial port speed to match on line speed as a non MNP modem 5 70 Break Control Kn ...

Страница 64: ...5 72 Serial Port Flow Control Option Q Command Q determines which flow control method the modem uses Q0 Disables serial port flow control Q1 Uses bi directional XON XOFF hardware flow control An XOFF will stop transmission and an XON will resume it XON XOFF characters are generated by the modem with the same parity as data characters The serial port also responds in the same way to an XON XOFF sen...

Страница 65: ...tes of inactivity the modem waits for before hanging up if no data is sent or received during a normal or reliable link The inactivity timer is effective in normal and reliable links and must be set before the modem enters on line state 5 74 Result Code Form V Command V determines whether the V 42bis MNP extended response codes are displayed as well as with or without data compression identifiers ...

Страница 66: ...NP Classs 5 mode while the V 42BIS identifier means the modem is in V 42bis mode V4 Displays DCE speed and enables MNP V 42 error correction response codes with data compression indicated The REL COMP identifier means the modem is in MNP Class 5 mode while the V 42BIS identifier means the modem is in V 42bis mode 5 75 XON XOFF Pass Through X Command X determines whether the modem passes the XON XO...

Страница 67: ...itial waiting period the modem immediately goes into normal mode The auto reliable fallback character is recognized only when the modem answers a call in auto reliable N3 mode and C2 is in effect 5 77 Maximum Port Baud Rate Bn n 0 300 600 1200 2400 4800 7200 9600 12000 14400 16800 19200 21600 24000 26400 28800 Command Bn sets the maximum modem port baud rate speed The default is B0 which sets the ...

Страница 68: ...atic retrain When line quality is poor the modem attempts three times with speed adjustment to re establish the connection for a total of six seconds before hanging up 5 80 DCE Speed H Command H either enables or disables fixed DCE speed H0 Disables fixed DCE speed H1 Enables fixed DCE speed 5 81 Answer Tone Detection I Command I enables or disables answer tone detection I0 Enables answer tone det...

Страница 69: ... a leased line 5 85 Multi Phone Backup M Command M determines the type of phone system connected to the modem M0 Disables multi phone backup M1 Enables multi phone backup 5 86 Modem Protocol V Command V adjusts the modem s speed V0 V 34 Auto V1 V FC Auto V2 V 32bis Auto V3 V 34 V FC V 32bis V4 V FC V 32bis V5 V 34 only V6 V FC only V7 V 32bis only Page 69 ...

Страница 70: ...ulti phone redial order query For example AT N 3 Set redial times to 3 AT M1 Enables multi phone redial AT Z 426 Dials STN 4 2 and 6 ATDT 782 2456 If the line is busy the modem dials STN4 2 and 6 if STN 4 2 or 6 are busy the modem redials 782 2456 for 3 cycles Page 70 ...

Страница 71: ...g are the diagnostic tests your modem performs Note that T6 T7 and T3 are not applicable in Bell 103 CCITT V 21 or V 23 Local Analog Loopback Test LAL T1 Tests the communications path between the local modem and the local computer Local Digital Loopback Test LDL T3 Tests the communications path between the modem remote modem remote computer and telephone circuit Remote Digital Loopback Test RDL T6...

Страница 72: ...o the modem perform an LALST test This test verifies the modem itself 2 To determine a failure due to the computer perform LAL and LALST tests If an LAL test fails but an LALST passes the computer or path is probably at fault 3 To determine a failure due to a faulty telephone circuit perform LAL and RDLST tests to both the local modem and the remote modem If both modems pass an LAL test but fail a...

Страница 73: ...ocal Analog Loopback Test T1 The local loopback test LAL verifies the path between the computer and the modem Everything you type on the keyboard during the test will be echoed by the modem back to the computer To initialize an LAL test issue AT T1 The test begins after the modem responds with a carriage return and a line feed Type any character string on the keyboard and the string should appear ...

Страница 74: ...request Local computer Digital Loop Transmitter Receiver Local Modem Telephone Line Remote Modem Transmitter Receiver Remote computer TD RD Figure 6 2 Local Digital Loopback Test T3 6 8 Remote Digital Loopback Test T6 The remote digital loopback test RDL verifies the local computer and modem the telephone circuit and the remote modem Issue AT T6 to initiate the test Note that the remote modem shou...

Страница 75: ... your modem compares the received string with the original message to verify the path To initiate the test issue either of the following command lines when on line in asynchronous command state AT S18 0 T7 Test timer is disabled AT S18 30 T7 Test timer is set for 30 seconds Local computer Local M odem Digital Loop Remote Modem Transm itter Receiver Rem ote computer TD RD Transm itter Receiver Test...

Страница 76: ...d lines to initiate the test AT S18 0 T8 Test timer is disabled AT S18 30 T8 Test timer is set for 30 seconds The test begins after the modem sends a carriage return and line feed Local com puter TD R D A nalog Loop Transm itter R e ceiver Test P attern G enerator E rror C o unte r Telephone Line Figure 6 5 Local Analog Loopback with Selftest T8 When the test is terminated the modem responds with ...

Страница 77: ...ommand Sr For example AT S7 Reads register S7 AT S7 150 Sets register S7 to 150 AT S0 S16 Reads registers S0 and S16 Auto Answer Ring Number S0 Range 0 255 Unit Ring Default 0 Register S0 determines the number of rings before the modem answers a call For example S0 0 Will not auto answer calls S0 3 Answers incoming calls after the third ring Ring Count S1 Register S1 counts the number of rings on ...

Страница 78: ...to set this register to a different value if a non standard DTE is used Backspace Character S5 Range 0 32 127 Unit ASCII Default 8 Register S5 stores the backspace character ASCII decimal value which is used as the backspace key for editing and as the echoed character to move the cursor backwards on the screen Wait Time Before Dialing S6 Range 2 255 Unit sec Default 2 Register S6 determines how lo...

Страница 79: ...mma Dial Modifier S8 Range 0 255 Unit sec Default 2 Register S8 determines how long the modem pauses when a comma command is given For example ATDP9 782 2456 Instructs the modem to dial the PBX access number 9 and then pause for 2 seconds before dialing 782 2456 More than one comma command can be combined for a longer delay Carrier Detect Response Time S9 Range 1 255 Unit 0 1sec Default 6 Register...

Страница 80: ...peed S11 Range 50 255 Unit ms Default 95 Register S11 determines the touch tone dialing speed This register sets tone duration and spacing during touch tone dialing The default is approximately 5 26 digits per second Escape Code Guard Time S12 Range 0 255 Unit 20ms Default 50 Register S12 determines the required guard time before the first escape characters and after the last escape characters are...

Страница 81: ...le Local Analog Loopback Test T1 Bit 1 0 Disable Local Digital Loopback Test 1 Enable Local Digital Loopback Test 141 Bit 2 0 Disable Local Digital Loopback Test 1 Enable Local Digital Loopback Test T3 Bit 3 0 Loopback state OFF 1 Loopback state in progress Bit 4 0 Disable Remote Digital Loopback Test 1 Enable Remote Digital Loopback test T6 Bit 5 0 Disable Remote Digital Loopback Selftest 1 Enabl...

Страница 82: ... 0 means the test timer is disabled Auto Redial Interval Time S19 Range 0 255 Unit sec Default 2 Bits Mapped S20 Bit 0 3 0 Try dialup redial times N Bit 4 7 2 Try leased line rehandshake times B Bits Mapped S21 Bit 0 0 RJ 11 41S 45S modular jack 1 RJ12 12 13 modular jack Bit 1 0 DSR always ON S0 1 DSR reflects real S1 Bit 2 0 CTS tracks RTS R0 1 CTS always ON R1 Bit 3 4 0 Ignore DTR D0 1 DTR ON to...

Страница 83: ...ected M1 2 Speaker always on M2 3 M1 but speaker off during dialing M3 Bit 4 6 0 Short connect result code X0 1 Full connect result code X1 2 Wait for dial and check answer X2 3 Check busy and answer X3 4 Wait for dial check busy and answer X4 5 7 Reserved Bit 7 0 Make break ratio 39 61 P0 1 Make break ratio 33 67 P1 Bits Mapped S23 Bit 0 0 Disable request from RDL T5 1 Enable request from RDL T4 ...

Страница 84: ... determines how long the modem waits in sync async mode from connection sequence completion to DTR status examination This delay allows the modem to be switched from an asynchronous data terminal to a synchronous data terminal without breaking the connection In this mode the unit register is in seconds and the default is 5 seconds In asynchronous and other synchronous modes a DTR change ON or OFF ...

Страница 85: ... M2 3 Synchronous mode 3 M3 Bit 3 0 Normal speed pulse dialing 1 Fast speed pulse dialing Bit 4 5 0 Local modem synchronous transmit clock source X0 1 Local DTE synchronous transmit clock source X1 2 Remote modem synchronous transmit clock source X2 3 Reserved Bit 6 7 0 ITU T Bell auto mode B0 1 Bell 103 212A mode B1 2 ITU T V 23 back channel B2 3 ITU T V 23 main channel B3 Bits Mapped S28 Bit 0 4...

Страница 86: ...t speed 16 28800bps serial port speed 17 38400bps serial port speed 18 57600bps serial port speed 19 115200bps serial port speed Bit 5 6 0 Serial port even parity 1 Serial port space 2 Serial port odd parity 3 Serial port none mark Bit 7 0 Serial port 8 data bits 1 Serial port 7 data bits Bits Mapped S29 Bit 0 1 0 DCE 5 data bits 1 DCE 6 data bits 2 DCE 7 data bits 3 DCE 8 data bits Bit 2 3 0 DCE ...

Страница 87: ...ring sound B1 Bit 1 0 Disable call back security A0 1 Enable call back security A1 Bit 2 0 Disable hardware data security E0 1 Enable hardware data security E1 Bit 3 0 Open message working bit 1 Close message working bit Bit 4 0 Disable V 32 forward backward link 1 Enable V 32 forward backward link Bit 5 0 Command AT Z working bit 1 Command AT Z working bit Bit 6 7 0 Dialup line L0 1 2 wire leased...

Страница 88: ...re DTR dump in handshaking Bit 2 3 0 RLSD on 43dBm off 48dBm 1 RLSD on 33dBm off 38dBm 2 RLSD on 26dBm off 31dBm 3 RLSD on 16dBm off 21dBm Bit 4 5 0 Normal AT F ATZ 1 Quick ATZ 2 Quick AT F 3 Quick AT F ATZ Bit 6 7 0 Reserved Bits Mapped S35 Bit 0 3 0 9 STN for power on auto dial A0 9 15 Disable power on auto dial A99 Bit 4 5 0 Disable all Y0 1 Dialup line simulate leased line Y1 2 Leased line bac...

Страница 89: ...at 2400 bps 6 Attempt connection at 4800 bps 7 Attempt connection at 7200 bps 8 Attempt connection at 9600 bps 9 Attempt connection at 12000 bps 10 Attempt connection at 14400 bps 11 Attempt connection at 16800 bps 12 Attempt connection at 19200 bps 13 Attempt connection at 21600 bps 14 Attempt connection at 24000 bps 15 Attempt connection at 28800 bps 16 Attempt connection at 31200 bps 17 Attempt...

Страница 90: ...izer 1 Disable compromise equalizer Bit 7 0 Disable detect phase 1 Enable detect phase Bits Mapped S40 Bit 0 0 Disable remote access E0 1 Enable remote access E1 Bit 1 4 0 Reserved Bit 5 0 Disable remote access security 1 Enable remote access security Bit 6 7 0 Reserved Remote Access Attention Character S41 Default 42 0 n 255 Unit ASCII V 42bis Compression Dictionary Max String Length S4 Default 1...

Страница 91: ... Set maximum dictionary size to 4048 entries Bit 5 0 Reserved Bit 6 7 0 Does not buffer data C0 1 Buffers data for 4 seconds until 200 characters or when a SYN character is detected then switches to normal C1 2 Does not buffer data switches to normal C2 3 Reserved Bits Mapped S44 Bit 0 0 Reserved Bit 1 0 Reserved Bit 2 0 Disable on line data echo E0 1 Enable on line data echo E1 Bit 3 0 Disable mo...

Страница 92: ...LAPM MNP mode 7 MNP normal mode Bits Mapped S46 Bit 0 2 0 Disable flow control Q0 1 Enable bi directional XON XOFF flow control Q1 2 Enable uni directional hardware flow control Q2 3 Enable bi directional hardware flow control Q3 4 Enable uni directional XON XOFF flow control Q4 5 CTS off until connection and Q2 Q5 6 CTS off until connection and Q3 Q6 Bit 3 0 RI on after handshake 1 RI off after h...

Страница 93: ...ow control character and pass through to local or remote system X1 Inactivity Timer S47 Default 0 0 n 255 Unit min Tn Wait for Connection Password S48 Range 0 255 Unit Second Default 15 Register S48 determines how many seconds the modem waits for a connection password after it answers an incoming call If the password is not received during this period the modem will hang up Redial Limit S49 Range ...

Страница 94: ...RI reset timer Bit 4 0 Disable V25 calling tone 1 Enable V25 calling tone Bit 5 0 Disable T30 calling tone 1 Enable T30 calling tone Bit 6 7 0 Reserved Bits Mapped S54 Default 0 Bit 0 2 0 V 34 auto mode V0 1 V FC auto mode V1 3 V 32bis auto mode V2 4 V 34 V FC V 32bis V3 5 V FC V 32bis V4 6 V 34 only V5 7 V FC only V6 8 V 32bis only V7 Bit 3 7 0 Reserved Page 94 ...

Страница 95: ...Appendix B MODULAR JACK WIRING DIAGRAM R To Other Equipment Telephone Line T 1 2 3 4 5 6 To Modem 2 3 4 5 R T JACK PLUG Fig B 1 RJ 11 JM8 Modular Jack Wiring Diagram Page 95 ...

Страница 96: ... CONNECTIONS Phone Line Connect Pin 4 Pin 5 2 Wire Leased Line Connect Pin 1 Pin 2 4 Wire Leased Line Local Remote Pin 1 TX Pin 7 RX Pin 2 TX Pin 8 RX Pin 7 RX Pin 1 TX Pin 8 RX Pin 2 TX Fig B 2 RJ 45 Modular Jack Wiring Diagram ...

Страница 97: ... 112 Select Alternate Rate computer Õ modem 15 DB 114 Transmit Clock computer Õ modem 17 DD 115 Receive Clock computer Õ modem 18 141 Loopback Maintenance computer Ö modem 20 CD 108 Data Terminal Ready computer Ö modem 21 CG 140 Local Loopback computer Ö modem 22 CE 125 Ring Indicator computer Õ modem 23 CI Select Alternate Rate computer Õ modem 24 DA 113 Transmit Clock computer Ö modem 25 142 Tes...

Страница 98: ...mines whether to answer as a fax or data modem Service Class Indication FCLASS This command determines whether the faxmodem is in fax or data mode It also indicates the fax command set service class FCLASS 0 Data mode FCLASS 2 Class 2 mode FCLASS Inquires service class capability FCLASS Inquire service class identification Capability to Receive FCR This command inquires about receive function capa...

Страница 99: ... per inch 1 Fine mode 196 lines per inch BR Bit Rate 0 2 400 bps ITU T V 27ter 1 4 800 bps ITU T V 27ter 2 7 200 bps ITU T V 29 or V 17 3 9 600 bps ITU T V 29 or V 17 4 12 000 bpsITU T V 17 5 14 400 bpsITU T V 17 WD Page Width 0 1 728 pixels in 215 mm LN Page Length 0 A4 size 297 mm 2 Unlimited length DF Data Compression Format 0 1 D modified Huffman EC Error Correction 0 Disable error correction ...

Страница 100: ...BF ST This command determines how the faxmodem returns the negotiated T 30 parameters for the current session See the FDCC section for parameter definitions Command FDIS displays the help message of this command Begin or Continue Phase C Data Reception FDR This command initiates a transition to Phase C data reception and forces a transition in the control software from command parsing to backgroun...

Страница 101: ... Transmit Page Punctuation FET This command is used to punctuate page and document transmission after one or more FDT commands The following is a list of the parameters Value of n Definition 0 PPS MPS Another page same document 2 PPS EOP No more pages or documents Local ID String FLID Syntax FLID local ID string This command sets the local faxmodem ID The command syntax is FLID local ID string and...

Страница 102: ...e C speed the lowest negotiable speed for a session The following is a list of the definitions for the value of n Value of n Definition 0 2 400 bps ITU T V 27ter 1 4 800 bps ITU T V 27ter 2 7 200 bps ITU T V 29 or V 17 3 9 600 bps ITU T V 29 or V 17 4 12 000 bps ITU T V 17 5 14 400 bps ITU T V 17 Issue FMINSP to display the current n value Request Product Revision Identification FREV This command ...

Страница 103: ...on The remote fax capability and intentions are reported The sub parameters are reported by command FDCS FDTC Reports DTC frame information The remote fax capability and intentions are reported The sub parameters are described by command FDCS FHNG Call termination Indicates that the call has been terminated FNSF Reports received non standard negotiation frames FPTS Receive Transmit page transfer s...

Страница 104: ...CON is aslways sent to the DTE after which the modem accepts commands If this mode is entered from Voice Transmit Mode the DTE has issued the DLE ETX and the modem responds with VCON If this mode is entered from the Voice Receive Mode because of a key abort the modem issues the DLE ETX followed by VCON Voice Receive Mode Voice Receive Mode is entered when the DTE issues the VRX command in order to...

Страница 105: ...s to detect and report DTMF and calling tones if enabled by the VTD command This mode is typically used when playing back greeting messages or previously received recorded messages In this mode If the Voice Sub configuration is in operation voice decompression is provided by the ADPCM codes and the decompressed ADPCM voice data is then reconstituted into analog voice by the DAC at the original com...

Страница 106: ...g format CLS Select data fax or voice audio mode MDL Identify manufacter MFR Identify model REV Identify revision level TL Audio output transmit level VBS Bits per sample VBT Beep tone timer VLS Voice line select VRX Voice Receive Mode VSD Silence detetion tuner VSP Silence detection period VSR Sampling rate selection VSS Silence detection tuner VTD DTMF tone reporting capability VTS Generate tone...

Страница 107: ...equests a switch from Voice Receive Mode to Online Voice Command Mode via the key abort CONNECT CONNECT is sent when switching from the Online Voice Command Mode to either Voice Receive Mode via the VRX command or to Voice Transmit Mode via the VTX command This message is sent to the DTE to inform it that it may begin receiving or sending ADPCM or PCM data Recommendation During the software instal...

Страница 108: ...ror correction only 23 CONNECT 2400 V42 Connection at 2400 bps in reliable mode error correction only 24 CONNECT 4800 V42 Connection at 4800 bps in reliable mode error correction only 25 CONNECT 9600 V42 Connection at 9600 bps in reliable mode error correction only 26 CONNECT 19200 V42 Connection at 19200 bps in reliable mode error correction only 27 CONNECT 7200 V42 Connection at 7200 bps in reli...

Страница 109: ...6400 V42bis Connection at 26400bps in ECDC reliable mode 51 CONNECT 28800 V42bis Connection at28800bps in ECDC reliable mode 60 CONNECT 300 NOR Connection at 300 bps in normal mode 61 CONNECT 600 NOR Connection at 600 bps in normal mode 62 CONNECT 1200 NOR Connection at 1200 bps in normal mode 63 CONNECT 2400 NOR Connection at 2400 bps in normal mode 64 CONNECT 4800 NOR Connection at 4800 bps in n...

Страница 110: ...g table shows response codes 0 through 8 and how they are related to each X command The denotes that the response code is disabled for that X command The remaining response codes are enabled by commands X1 X2 X3 and Command Syntax and Response Co Descommand Syntax and Response Co Descommand Syntax and Response Codes X4 but disabled by command X0 RESPONSE CODES XO X1 X2 X3 X4 0 OK X0 X1 X2 X3 X4 1 ...

Страница 111: ... command echo E1 Enable command echo H0 Hang up the connection on hook H1 Go off hook to make a call I0 Modem product code I1 ROM version I2 Verify ROM checksum K0 n Carrier level control n dbm L0 Speaker volume off L1 Speaker volume low L2 Speaker volume medium L3 Speaker volume high M0 Speaker always off M1 Speaker on before connect M2 Speaker always on after off hook M3 M1 but off during dialin...

Страница 112: ...ASY A AT NORMAL Y1 Assign SCP1 as major profile F6 SYN D AT DIRECT Yn Assign SCPn as major profile n 2 3 4 F7 SYN A AT DIRECT F8 ASY V25BIS F9 SYN BSC V25BIS Zn X Save phone number x to STNn n 0 9 F10 SYN HDLC V25BIS F11 PWR 2W LEASED A0 MNP block size 64 characters F12 PWR 4W LEASED A1 MNP block size 128 characters G0 Disable guard tone A2 MNP block size 192 characters G1 Guard tone 550 Hz A3 MNP...

Страница 113: ...rd security V3 Reliable and compression DTE speed E1 Enable connection password security V4 Reliable and compression DCE speed F Display remote access and connection security password X0 Disable Xon Xoff pass through X1 Enable XON XOFF pass through G Set callback close message 75 char An Auto reliable fallback character default A0 I0 Set to smart mode Bn Maximum DCE speed default B0 I1 Set to dumb...

Страница 114: ... C1 V25bis async E0 Disable remote access E1 Enable remote access C2 V25bis bi sync C3 V25bis HDLC P Set remote access password Page 114 ...

Страница 115: ...F Dial Tone Multi Frequency DTR Data Terminal Ready ECDC Error Correction Data Compression FB Fall Back FDP Factory Default Profile LL Backup DL Leased Line Backup Dialup Line LALST Local Analog Loopback with Selftest LAL Local Analog Loopback LCD Liquid Crystal Display LDL Local Digital Loopback LF Line Feed MNP Microcom Networking Protocol NVRAM Non Volatile Random Access Memory PSTN Public Swit...

Страница 116: ...eived Line Signal Detector RI Ring Indicator ROM Read Only Memory RTS Request To Send SCP Stored Configuration Profile SPK Speaker STN Stored Telephone Number SYNC Synchronous VAR Value Added Reseller XOFF Flow Control Character 13H XON Flow Control Character 11H ...

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